The most reasonably priced component used on the Xg250 2005 4d61 Belgium 1d4d6-352s1 Fuel Tank is the Bolt, Flange(8ba).
Some items from this specific schematic: Damper, Locating 3, Valve Packing (nas), Screw(3xv), Damper.
The Fuel Tank is made up of components including this Fuel Tank Comp. which is the most expensive.